串联式制动阀静特性仿真及测试方法研究

Study On the Simulation and Test Method of Static Characteristics for Series Brake Valve

针对串联式制动阀结构特征及静特性工作机理,基于AMEsim建立参数模型,分析结构参数对其性能影响;以行业标准为依据,结合工作机理及仿真参数,优化测试方法,设计线性模拟负载机构真实复现实车制动状态下静特性响应流程;结合高精度数据采集系统,以LabVIEW为平台开发测试软件,研制了一套静特性测试系统。对比分析仿真结果与实测数据,引入测试系统分析(MSA)方法,验证模型与系统的可靠性。实验数据表明:研制的测试系统测量能力指数C g大于1.67,系统精确度指标均小于30%,符合新设备验收及静特性测试要求。

The static characteristics of the series brake valve are applied to evaluate the relationship between the output pressure of an air-brake system and the brake stroke during the state of braking balance.The effect of the structural on static characteristics was analyzed by a parameter model based on the AMEsim.A static response process of the series brake valve was built both by its industry standards and the working principle of the linear load system in a simulation environment.In order to reproduce the response process under braking state,a measurement system of static characteristics for the series brake valve was designed by LabVIEW platform utilizing a high-accuracy data acquisition system.Both the MSA and comparative analytical method were introduced to verify the reliability of the system.The experimental result show that the measurement ability index C g is less than 1.67,and system accuracy indexes are less than 30%,which meet the acceptance requirements of new equipment.